部分js代码
[removed]
(() => {
let obj = {};
//获取DOM对象的方法
let $ = function(id){
return document.getElementById(id);
}
//获取预览图片路径
let getObjectURL = function(file){
let url = null ;
if (window.createObjectURL!=undefined) { // basic
url = window.createObjectURL(file) ;
} else if (window.URL!=undefined) { // mozilla(firefox)
url = window.URL.createObjectURL(file) ;
} else if (window.webkitURL!=undefined) { // webkit or chrome
url = window.webkitURL.createObjectURL(file) ;
}
return url ;
}
//十六进制转换器
let hexadecimal = function(num) {
var r = parseInt(num).toString(16);
if (r.length == 1) {
return '0' r;
}
return r.toUpperCase();
}
//判断颜色是否已存在
let checkHasColor = function(arr, r, g, b) {
for (var i = 0; i < arr.length; i ) {
var n = equalsColor(arr[0], arr[1], arr[2], r, g, b);
if (n >= 0.8) {
return true;
}
}
return false;
}
//判断相同颜色
let equalsColor = function(r1, g1, b1, r2, g2, b2) {
return (255 - Math.abs(r1 - r2) * 0.297 - Math.abs(g1 - g2) * 0.593 - Math.abs(b1 - b2) * 0.11) / 255;
}
//建立canvas画布
let canvas = function(obj,size,param){
let canvas = document.createElement("canvas");
if (!canvas.getContext) {
alert("很遗憾,您浏览器版本太老了,无法使用我们的小工具 !");
return;
}
})()
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